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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 479 · 40 questions
TalentJR

The fast method (Keep a running total): Start with the first number. Add the tens of the next number, then its ones. Keep going until the list ends — only one total in your head at a time.

NameDateTime takenScore ___ / 40
  1. 1.38 + 37 + 64 + 11 =
  2. 2.75 + 11 + 36 + 62 =
  3. 3.15 + 37 + 67 + 12 =
  4. 4.86 + 51 + 55 + 76 =
  5. 5.64 + 51 + 54 + 41 =
  6. 6.15 + 80 + 12 + 85 =
  7. 7.44 + 36 + 20 + 70 =
  8. 8.55 + 28 + 87 + 85 =
  9. 9.51 + 14 + 39 + 77 =
  10. 10.39 + 28 + 56 + 88 =
  11. 11.60 + 62 + 67 + 31 =
  12. 12.16 + 34 + 58 + 65 =
  13. 13.39 + 61 + 74 + 37 =
  14. 14.51 + 64 + 81 + 89 =
  15. 15.75 + 60 + 80 + 58 =
  16. 16.18 + 34 + 43 + 30 =
  17. 17.48 + 30 + 29 + 30 =
  18. 18.82 + 53 + 70 + 59 =
  19. 19.21 + 29 + 66 + 61 =
  20. 20.81 + 81 + 73 + 84 =
  21. 21.89 + 13 + 67 + 28 =
  22. 22.26 + 26 + 45 + 16 =
  23. 23.83 + 84 + 48 + 57 =
  24. 24.65 + 17 + 54 + 79 =
  25. 25.77 + 75 + 25 + 81 =
  26. 26.27 + 15 + 15 + 13 =
  27. 27.75 + 50 + 15 + 15 =
  28. 28.20 + 48 + 66 + 82 =
  29. 29.89 + 72 + 63 + 81 =
  30. 30.50 + 47 + 67 + 61 =
  31. 31.46 + 13 + 76 + 18 =
  32. 32.71 + 22 + 21 + 26 =
  33. 33.87 + 27 + 80 + 57 =
  34. 34.34 + 76 + 41 + 60 =
  35. 35.69 + 72 + 38 + 24 =
  36. 36.16 + 87 + 33 + 68 =
  37. 37.62 + 16 + 15 + 27 =
  38. 38.16 + 37 + 75 + 35 =
  39. 39.64 + 26 + 15 + 88 =
  40. 40.34 + 33 + 60 + 22 =

Answer key

  1. 150
  2. 184
  3. 131
  4. 268
  5. 210
  6. 192
  7. 170
  8. 255
  9. 181
  10. 211
  11. 220
  12. 173
  13. 211
  14. 285
  15. 273
  16. 125
  17. 137
  18. 264
  19. 177
  20. 319
  21. 197
  22. 113
  23. 272
  24. 215
  25. 258
  26. 70
  27. 155
  28. 216
  29. 305
  30. 225
  31. 153
  32. 140
  33. 251
  34. 211
  35. 203
  36. 204
  37. 120
  38. 163
  39. 193
  40. 149

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